Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuinely new context: the return shape is typed external_<id> TypeScript declarations intended for execute_typescript, and results are scoped to what the credential can reach. It does not mention pagination or result limits, a minor gap for a listing tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences, front-loaded with the purpose and the call-first directive before the optional filter detail. The category parenthetical is long but earns its place by scoping the tool; the query explanation mildly duplicates the schema.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need no elaboration, yet the description still names the return type and its intended consumer. Purpose, trigger, scope, and the optional filter are all covered for a one-parameter discovery tool.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and the single parameter is fully documented in the schema. The description restates the same substring semantics rather than adding new meaning (e.g., matching precedence or examples), so baseline 3 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb+resource: it finds the SuperBooks bookkeeping operations available to this connection and returns them as typed external_<id> TypeScript declarations. It explicitly ties itself to its only sibling by naming execute_typescript as the consumer, so an agent can distinguish search from execution without opening either schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

"Call it first for any question about the user's business finances" gives an explicit ordering rule and the triggering condition. The parenthetical domain list (transactions, invoices, customers, reports, documents, inbox, tags, time tracking) further clarifies the scope of use.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.